You can't 'split' a power supply voltage. You can have several circuits running in parallel from the same voltage supply.
You can have the 12V supply go to a DC/DC converter and create a 10V supply that way.
You can't 'split' a power supply voltage. You can have several circuits running in parallel from the same voltage supply.
You can have the 12V supply go to a DC/DC converter and create a 10V supply that way.